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International Journal of Concrete Structures and Materials

Table 1 Summary of test results.

From: Axial–Flexural Interaction in FRP-Wrapped RC Columns

Specimen designationa

Loading eccentricity (mm)

Pu (kN)

Ki (kN/mm)

Δu (mm)

Δmax (mm)

Δl (mm)

μ

Toughness (kN mm)

Moment (kN m)

G0-U-A

0

1529

2896

0.76

0.95

–

2.00

715

0

G0-U-B

1573

3692

0.62

0.75

1.82

618

G0-C-A

0

1930

1986

4.56

4.57

–

5.60

7356

0

G0-C-B

1872 (123)b

2027 (61)

2.70 (526)

2.75 (431)

3.67 (243)

3853 (841)

G0-LC-A

0

1987

2079

4.93

5.36

–

5.91

8335

0

G0-LC-B

2041

2299

3.22

3.93

4.68

5300

G0-LC-C

2021 (130)b

2114 (66)

3.72 (573)

4.07 (524)

3.77 (251)

5517 (957)

G25-U-A

25

1351

2213

0.82

0.94

2.30

1.80

680

36.9

G25-U-B

1154

2385

0.71

0.76

0.64

1.88

497

29.6

G25-C-A

25

1545

2724

1.27

1.80

7.34

3.50

1397

50.0

G25-C-B

1580 (125)b

1912 (101)

1.68 (192)

3.23 (296)

7.32 (499)

3.70 (196)

1862 (277)

51.1 (152)

G25-LC

25

1682 (134)b

2070 (90)

1.37 (178)

1.65 (194)

1.89 (129)

2.97 (161)

1542 (262)

45.2 (136)

G50-U-A

50

900

NA

NA

NA

3.34

NA

NA

48.0

G50-U-B

894

1501

0.62

0.65

2.43

1.16

280

46.7

G50-C

50

1210 (135)b

2216 (148)

0.83 (134)

1.05 (162)

5.50 (191)

1.94 (167)

639 (228)

67.2 (142)

G50-LC-A

50

1341

1633

1.58

1.61

1.81

1.92

1527

69.5

G50-LC-B

1303 (147)b

1603 (108)

1.12 (218)

1.18 (215)

3.80 (97)

1.66 (154)

905 (434)

70.1 (147)

G65-U

65

789

1803

0.63

0.80

3.20

1.92

318

53.8

G65-C

65

1048 (133)b

1693 (94)

1.41 (224)

1.59 (199)

8.60 (269)

2.60 (135)

1123 (353)

77.1 (143)

G65-LC

65

1122 (142)b

2032 (113)

0.97 (154)

1.20 (150)

7.90 (247)

2.57 (134)

747 (235)

81.8 (152)

GINF-U-A

Infinite

117

20.6

20.47

25.76

–

3.98

2425

22.4

GINF-U-B

125

19.2

17.09

17.82

4.12

1625

24.0

GINF-C-A

Infinite

127

24.4

24.62

24.62

–

6.84

2505

24.4

GINF-C-B

134 (108)b

22.4 (118)

28.24 (141)

28.24 (243)

5.98 (158)

3158 (140)

25.7 (108)

GINF-LC

Infinite

260 (215)b

24 (121)

16.14 (86)

16.14 (74)

–

2.17 (54)

2492 (123)

49.9 (215)

  1. NA: Axial displacement measurements were dismissed for this specimen.
  2. aG0, G25, G50 and G65 is the group designation indicating the loading eccentricity in mm; GINF is the group designation indicating column tested in pure bending; U: Unwrapped specimen; C: Column wrapped with a circumferential CFRP ply; LC: Column wrapped with two CFRP plies: one longitudinal and another circumferential.
  3. bNumbers between brackets in this row are computed as the ratio of the response parameter (average value in case of specimen duplicates) to that of the control unwrapped companion specimen (average value in case of specimen duplicates) tested under the same load eccentricity, expressed as a percent.
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